Sunrise 6:16 AM   Sunset 7:28 PM Moonrise 2:56 PM   Moonset 3:56 AM

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PZZ655 Inner Waters From Point Mugu To San Mateo Pt. Ca Including Santa Catalina And Anacapa Islands- 829 Pm Pdt Thu Apr 18 2024
Tonight - W winds 10 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 ft at 8 seconds and S 3 ft at 15 seconds. Patchy fog. Fri - Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. S swell 3 ft at 14 seconds. Patchy fog in the morning. Fri night - W winds 10 to 15 kt in the evening, becoming se 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 3 ft at 15 seconds. Patchy fog after midnight. Sat - SE winds 5 to 10 kt, becoming sw 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 ft at 6 seconds and S 3 ft at 15 seconds. Patchy fog in the morning. Sat night - W winds 10 to 15 kt in the evening, becoming variable 10 kt or less. Wind waves 2 ft or less. Mixed swell W 2 to 3 ft at 6 seconds and S 3 ft at 14 seconds. Sun - Winds variable 10 kt or less, becoming W 10 to 15 kt in the afternoon. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft at 8 seconds and S 3 ft at 14 seconds. Patchy fog in the morning. Sun night - W winds 10 to 15 kt in the evening, becoming sw 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft at 8 seconds and S 3 ft at 14 seconds. Patchy fog after midnight. Mon - SW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell W 2 to 4 ft and S 3 ft. Patchy fog. Tue - SW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 2 ft and S 3 ft. Patchy fog.

PZZ600 829 Pm Pdt Thu Apr 18 2024
synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park - .at 03z, or 8 pm pdt, a 1028 mb high was centered north of washington state, while a 10005 mb low was centered in southern nevada.

FXUS66 KLOX 190332 AFDLOX

Area Forecast Discussion...UPDATED National Weather Service Los Angeles/Oxnard CA 832 PM PDT Thu Apr 18 2024

SYNOPSIS
18/827 PM.

Strengthening onshore flow will bring a cooling trend to most areas through Friday, along with more extensive night through morning low clouds and fog. A warming trend is expected over the weekend as weak ridging builds in aloft. A significant cooling trend with a very deep marine layer is expected starting Tuesday and persisting through late next week.

.SHORT TERM (THU-SUN)...18/827 PM.

***UPDATE***

A slightly cooler day across the area today, especially along the Central Coast where a stubborn marine provided only brief clearing during the afternoon hours. Peak highs were near 80 in the valleys, with low 80s observed in the Antelope Valley.

Expect further cooling of about 3 to 5 degrees for most places tomorrow with highs in the 60s and 70s. A weak upper trough will swing across the area, helping to spin up a deepening marine layer that will push farther inland tonight into early Friday. Low clouds could extend through San Luis Obispo County to the eastern border overnight. This layer will likely be slow to clear, similarly to today, with a chance of reverse clearing over the beaches. Due to higher ceilings, the beaches won't see much fog, with there will be areas of fog affecting many foothill locations.

***From Previous Discussion***

Some additional deepening expected Friday night as well, however weak ridging is expected to move into the area Saturday along with weakening onshore flow that should lead to earlier clearing and warmer temperatures in most areas. Much less stratus expected Sunday with much warmer temperatures, likely the warmest day for at least a week if not longer with mid 80s in the valleys and mid to high 70s for coastal areas away from the immediate coast.

.LONG TERM (MON-THU)...18/149 PM.

Ridging will weaken Monday as a trough approaches from the west.
The trough will be the dominant player next week keeping temperatures below normal starting Tuesday and lasting into the following weekend. Ensemble solutions have been hinting at some light rain chances the latter half of the week but the best chances seem to be next Friday which is still outside the current 7 day forecast window. The first trough comes through Wednesday and some drizzle can't be ruled out that morning. Otherwise, just much cooler temperatures with highs mostly in the 60s. Strong onshore flow expected most of the week, meaning a steady does of marine layer stratus for coast and valleys, later than usual clearing, and gusty winds across the interior, especially later in the week.

AVIATION
19/0016Z.

At 2341Z at KLAX, the marine layer at KLAX was about 1300 ft deep. The inversion top was at 2400 ft with a temp of 17 C.

Conds will be mostly IFR, with some LIFR possible in the valleys, then improve to MVFR later tonight into Friday morning at coastal areas. Timing of cig arrival and clearing may be off by +/-2 hours.

KLAX...Moderate to low confidence in TAF. Timing of cig arrival may be off by +/-2 hours, and there is a 30% chance of clearing after 23Z Fri. No significant east wind component expected.

KBUR...Moderate confidence in TAF. Timing of cig arrival and clearing may be off by +/-2 hours, and there is a 30% chance of several hours OVC004 cigs.

MARINE
18/833 PM.

High confidence in conditions remaining below Small Craft Advisory (SCA) levels thru Saturday morning, except for localized SCA level NW-W winds south of Point Conception Friday afternoon and evening. SE winds around 10 knots should occur each morning from the SBA Channel southward to San Mateo Point. Locally stronger SE gusts are possible thru the Anacapa Passage and San Pedro Channel.

NW winds will likely reach SCA levels in the outer waters Saturday afternoon through Sunday, and across the inner waters north of Point Sal and the Santa Barbara Channel during the afternoon/evening hours over the weekend. These winds will build short period seas over all waters. There is a 30% chance of SCA conditions in the outer waters Monday.

LOX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.

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El Segundo
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